83 results about "Dry mixing" patented technology

This invention discloses a dry bonding method for positive electrode materials and solid electrolyte layers in solid-state batteries. The method first involves dry mixing and pre-pressing positive electrode active material powder, solid electrolyte powder, and conductive agent powder to form a positive electrode composite material preform. Subsequently, the surface of the solid electrolyte layer is activated to increase its surface energy. A key step is to apply longitudinal vibration at a specific frequency and amplitude to the preform and the activated solid electrolyte layer for resonant acoustic interface coupling treatment, causing microscopic rearrangement and initial meshing of interface particles. This invention is solvent-free throughout the process. Through the synergistic effect of vibration and hot pressing, a stable interface with tight contact, strong bonding, and low impedance is constructed at the microscale, effectively solving problems such as poor interface contact, easy peeling, or performance degradation caused by solvent residue in existing dry and wet processes. It is particularly suitable for high-activity solid-state battery systems.

This utility model discloses a reaction vessel for improving mixing effect, including a reaction vessel body. A positioning support rod is provided at the bottom of the interior of the reaction vessel body. A heating groove is provided on the outer wall of the reaction vessel body, and a heating rod is provided inside the heating groove. A heat transfer oil outlet is provided on one side of the bottom of the heating groove, and a heat transfer oil inlet is provided above the other side of the heating groove. Support frames are provided on the lower sides of both sides of the reaction vessel body. In this utility model, a screen is provided at the bottom of the material mixing cylinder. This structure is suitable for mixing multiple raw materials. During the addition of raw materials, dry mixing can be performed using the material mixing cylinder. Simultaneously, the screen at the bottom can screen and crush any lumpy raw materials, ensuring even downward distribution and conveying of the raw materials. This effectively avoids material clumping, accelerates the mixing speed, and thus improves the mixing effect.

This invention belongs to the field of building repair materials technology and provides a water-resistant and freeze-resistant magnesium phosphate cement repair mortar and its preparation method. The raw materials of the water-resistant and freeze-resistant magnesium phosphate cement repair mortar include: modified magnesium oxide, potassium dihydrogen phosphate, admixture, retarder, fine aggregate, water-reducing agent and water. The preparation method includes: (1) dry mixing: the modified magnesium oxide, potassium dihydrogen phosphate, admixture, fine aggregate and retarder are dry mixed to obtain a dry material system; (2) wet mixing and molding: half the mass of water is added to the dry material system, and after stirring, the remaining mass of water and water-reducing agent are added, and stirring is continued to obtain the water-resistant and freeze-resistant magnesium phosphate cement repair mortar. The repair mortar has excellent water resistance, freeze resistance and mechanical properties. The preparation method has a simplified preparation process, low production cost, and can realize the high-value utilization of solid waste, meeting the needs of rapid repair of building projects in harsh environments such as dampness and cold.

This application belongs to the field of powder metallurgy technology, specifically a bicrystalline cemented carbide and its preparation method. The preparation method includes the following steps: mixing fine WC powder (2~4μm), Co powder, VC, and Cr3C2, followed by ball milling and spray granulation to obtain fine WC-Co composite powder; mixing coarse WC powder (8~12μm), Co powder, and ultrafine WC powder (0.15~0.25μm), followed by ball milling and spray granulation to obtain coarse WC-Co composite powder; and dry mixing, pressing, and sintering the fine WC-Co composite powder and the coarse WC-Co composite powder to obtain a bicrystalline cemented carbide with a Rockwell hardness of 87~90 HRA and a fracture toughness of 14~17 MPa·m. 1 / 2 The bending strength is 2500~3000MPa. This application prepares coarse and fine WC-Co composite powders separately, so that the inhibitor can effectively suppress the growth of fine WC grains during the sintering stage, while the ultrafine WC can promote the growth of coarse WC grains. This results in the prepared cemented carbide exhibiting a clear dual-scale WC grain distribution, while possessing both high hardness and high toughness. After dry mixing and pressing sintering, the prepared bicrystalline cemented carbide has high density.

This application discloses a sheep milk probiotic formula milk powder that can regulate intestinal flora and its preparation method. By weight, it contains the following raw material components: 600-700 parts sheep milk base, 5-15 parts compound probiotic powder, 30-60 parts prebiotic composition, 10-30 parts functional additives, and 5-20 parts nutritional fortifiers. This compound formula combines multiple probiotics and optimizes the strain ratio to achieve a synergistic colonization effect. The probiotics are prepared using a freeze-drying process, effectively improving problems caused by flora imbalance. Simultaneously, multiple compound prebiotics provide nutritional support for the proliferation of beneficial bacteria, synergistically enhancing the intestinal regulatory effect. Added functional components such as lactoferrin, chitosan, β-glucan, and poria cocos polysaccharide make it suitable for long-term conditioning consumption by sub-healthy individuals and those with weak digestive systems. The raw sheep milk undergoes vacuum distillation to remove the muttony odor. A process of wet powdering followed by aseptic dry mixing of probiotics is used, resulting in a more stable overall quality of the finished product.

The application discloses a carbon dioxide adsorbent and a preparation method and application thereof, and relates to the technical field of carbon dioxide capture and resource utilization. The preparation method comprises the following steps: raw material pretreatment: the carbide slag and fly ash are respectively subjected to screening and drying treatment; preparation of the carbon dioxide adsorbent: the pretreated carbide slag and fly ash are placed in a mixing device in a mass ratio of 8-10:1 for dry mixing treatment to obtain a mixture, and then the mixture is placed in a high-temperature reaction furnace for constant-temperature calcination at 840 DEG C-860 DEG C, and the calcination time is 1h-3h, so that a carbon dioxide adsorbent containing Ca 12 Al 14 O 33 substance is generated in situ. The carbon dioxide adsorbent provided by the application takes two kinds of industrial solid wastes, namely, carbide slag and fly ash, as raw materials, can be applied to carbon dioxide capture, greatly reduces the cost of calcium cycle carbon dioxide capture, and opens up a high-value path for bulk resource utilization of the carbide slag and fly ash.

This invention proposes a lightweight, high-strength inorganic microcrystalline plastic insulation board and its preparation method. The method involves dry mixing ultrafine activated cementitious materials, composite insulating aggregates, and functional additives, placing the mixture between parallel electrode plates, and applying and maintaining a low-intensity alternating electric field. This causes the charged particles and new biological phases generated during the hydration process of the ultrafine activated cementitious materials to migrate directionally under the influence of the electric field. Then, a vacuum is applied to one side of the mold, while a permeating liquid containing nano-silica sol and film-forming polymers is applied to the other side. The mixture is then pressed, cured, and cut to obtain the lightweight, high-strength inorganic microcrystalline plastic insulation board. This invention utilizes an electric field to drive the directional migration of charged particles and new biological phases generated during the hydration process of the cementitious materials in the early stages of hydration. This allows the ultrafine cementitious particles to preferentially and orderly coat the surface of the insulating aggregates, thereby pre-constructing a tightly bonded and densely structured slurry network at the microscale.

The present invention relates to a dry electrode coating system and method, the system comprising: a dry mixing unit for producing an active material by mixing precursor materials; a complex mixing unit for producing an electrode by mixing the active material with a conductive material and a binder; a dry coating unit for thickly applying the produced electrode to a current collector; and a winder for winding the coated current collector.

The application discloses a kind of based on asphalt pavement milling material's prefabricated asphalt brick and its preparation method, belong to recycling technology field of renewable resources, the method includes: waste asphalt pavement is broken and is screened to obtain recycled asphalt mixture;First with regenerant, aromatic compound and basalt fiber dry mixing and standing activation;Again with cement, silica ash dry mixing;Subsequently, add water and polyacrylic acid sodium wet mixing mortar;In the state of stirring, add emulsified asphalt and mix to obtain mixing material;Finally, vibration forming, demolding curing prefabricated asphalt brick is prepared.Compared with prior art, by step mixing process and the synergistic effect of multiple functional components, high-mixing resource utilization of asphalt milling material is realized.The prefabricated asphalt brick prepared has a dense structure, high bulk density, high compressive strength and excellent water resistance, effectively solves the problem of milling material solid waste disposal, is economical and environmentally friendly, and is suitable for popularization and application.

The application relates to a preparation method and application of a composite positive electrode material based on dry mixing and wet mixing of slurry. It is found for the first time that the early addition of a conductive agent into ball milling accelerates the side reaction of a high-nickel positive electrode and a sulfide electrolyte, and influences the battery performance. Based on this, the application adopts step-by-step ball milling in dry mixing, that is, the high-nickel positive electrode material is first ball milled with the sulfide electrolyte, so that the sulfide electrolyte is uniformly coated on the surface of the high-nickel positive electrode material in situ, the agglomeration is reduced, and the mixing uniformity is improved, then the conductive agent is added for rapid ball milling, the generation of side reactions is reduced, and the cycle stability and rate performance of the battery are improved; meanwhile, the application also adopts gradient mixing of slurry, that is, the binder is first dissolved in an organic solvent, then the binder is mixed with the above dry mixing and the organic solvent in a wet mixing mode of slurry, the uniformity and stability of the slurry are improved, the binder caking and "jelly effect" phenomena are avoided, and the cycle stability and rate performance of the battery are further improved.

This invention discloses a method for synthesizing halide solid electrolytes without ball milling. It includes the following steps: S1, dry mixing of precursor powders to obtain a precursor mixture; the precursor powders are the raw materials for synthesizing halide solid electrolytes, and the dry mixing is non-ball milling mixing; S2, pressing the precursor mixture into a compact; S3, heat-treating the compact; the heat treatment is a gradient heat treatment, including a first holding stage and a second holding stage. This invention uses non-ball milling dry mixing instead of traditional high-energy ball milling, combined with heat treatment, enabling the precursor mixture to complete solid-phase reaction and densification in a shorter time, thereby obtaining a halide solid electrolyte with high ionic conductivity. The synthesis method of this invention has a short preparation time, low energy consumption, simple and low-cost equipment, is clean, and has a wide range of applicable raw materials, making it suitable for various halide solid electrolyte systems.

This invention relates to the field of ancient building construction technology, and more specifically, to a graphene intelligent concrete construction method. The method includes: S1, raw material pretreatment; S2, graphene dispersion preparation; S3, concrete mixing: dry mixing of cement, aggregates, active powder, and carbon fiber, followed by wet mixing with water and admixtures, then adding the finished graphene dispersion and mixing again. After passing the inspection, a graphene intelligent concrete mixture is obtained; S4, concrete transportation; S5, concrete pouring; S6, concrete vibration; S7, surface treatment: troweling the graphene intelligent concrete substrate, and tidying and protecting the intelligent monitoring electrode wires; S8, curing; S9, intelligent monitoring system debugging. This method effectively avoids problems such as graphene agglomeration, conductive network breakage, and concrete segregation. Combined with monitoring data for reverse verification of construction quality, it forms a closed loop of construction, monitoring, and feedback, ensuring long-term stable engineering performance. This invention is mainly applied to the construction of graphene intelligent concrete.

The application discloses a flocculant for papermaking wastewater treatment and a preparation method thereof, and relates to the technical field of papermaking wastewater treatment and prevention agents. The method comprises the following steps: sequentially performing alkalization, quaternary ammonium and free radical graft copolymerization modification on chitosan to construct a high-molecular skeleton with strong cationic and comb structure; then introducing tannic acid for interface coordination pre-anchoring, and combining formic acid as a defect inducer to in-situ grow a zirconium-based MOF shell layer with a mesoporous structure on the surface of the graft copolymer to form an organic-inorganic composite carrier; finally, anhydrous ferrous sulfate is loaded by dry mixing, and the final product is independently packaged with potassium persulfate and polyaluminum ferric chloride respectively. The flocculant prepared by the application has the functions of strong electric neutralization, efficient adsorption bridging and in-situ catalytic oxidation, has a deep removal effect on COD in papermaking wastewater, especially on refractory organic matter, and has good product stability, and is convenient to store and use.

The application discloses transparent flame-retardant polycarbonate and a preparation method thereof. The preparation method comprises the following steps: dry mixing polycarbonate resin, sulfonate flame retardant, a compatilizer and an additive in a high-speed mixer for 3-8 minutes; melt blending is performed by using a co-rotating twin-screw extruder to disperse the sulfonate flame retardant to a sub-micron level; wherein the twin-screw extruder is provided with a high-shear screw element in a mixing section, and the screw length-diameter ratio is 40:1 to 48:1; the screw rotation speed is 200-400 rpm; extruded strip material is water-cooled and pelletized to obtain transparent flame-retardant polycarbonate particles. By means of the micro-dispersion and compatilization process, micron-level dispersion and stable compatibility of the sulfonate flame retardant in the polycarbonate are realized, so that the flame-retardant efficiency and product life are improved while the high transparency is maintained.

A hemp-magnesium oxychloride cement composite material and a preparation method thereof, which relate to a cement composite material and a preparation method thereof. The present application aims at solving the problem that the prior art cannot reduce the damage of internal stress concentration to the mechanical strength of MOC while fully exerting the water resistance improvement effect of phosphonic acid modifier on MOC. The hemp-magnesium oxychloride cement composite material is prepared from magnesium chloride hexahydrate, magnesium oxide, diphosphoric acid and hemp straw. The method comprises the following steps: 1, uniformly mixing magnesium chloride hexahydrate, distilled water and a solution containing diphosphoric acid to obtain a mixed system; 2, dry mixing hemp straw and magnesium oxide powder, and then adding the mixture into the mixed system to stir and dissolve; and 3, solidifying. The present application is used for hemp-magnesium oxychloride cement composite material and preparation thereof.

The present application relates to a kind of efficient dry method electrode mixing method for sodium-ion battery hard carbon negative electrode, belong to sodium-ion battery hard carbon negative electrode technical field.The mixing method includes the following steps:S1, hard carbon and conductive carbon black SP are mixed uniformly, PTFE powder is added, mixed uniformly, ensure that mixing temperature is <18 ℃;Temperature is controlled at 45±2 ℃ and is stirred at medium speed;Finally, temperature is controlled at 50±2 ℃, and high-speed stirring is carried out, to obtain hard carbon negative electrode material.The present application uses solvent-free dry mixing process, realizes the synergistic optimization of efficiency, energy consumption, structure and performance in the process of pole piece preparation;Lay the key process foundation for the preparation of high-performance, high-reliability sodium-ion battery hard carbon negative electrode.

This invention discloses an instant gelling powder of sodium alginate / calcium β-hydroxy-β-methylbutyrate with dual functions of fat reduction and muscle gain, and its application, belonging to the field of functional food or pharmaceutical preparation technology. The powder of this invention is prepared by dry mixing sodium alginate and CaHMB at a weight ratio of 5~10:1~5, preferably 7:3, wherein the guluronic acid content of sodium alginate is ≥50%. In use, 1g of powder is added to 20~40mL of water at 60~100°C, and stirred to form a hydrogel. After oral administration, the powder rapidly forms a gel in the stomach, producing a feeling of fullness, and simultaneously achieves fat reduction, muscle gain, and metabolic regulation functions by regulating myostatin expression. This invention overcomes the limitation of existing weight management products with only one function, innovatively integrating the three major effects of instant satiety, fat reduction, and muscle gain. The preparation process is simple and environmentally friendly, requiring no added chemical excipients, and has significant technological advancement and market application value.

The application discloses a kind of high thermal shock resistance magnesium carbon brick, which is made of the following raw materials by weight percentage: fused magnesite aggregate 60-75%, fused magnesite fine powder 10-20%, flake graphite 8-12%, thermosetting phenolic resin binder 3-4%, vitamin C 0.3-0.8%, and zirconium diboride 2.2-4.9%. The preparation process of the magnesium carbon brick disclosed in the application includes: dissolving VC in part of the phenolic resin to form an acid-based pretreatment solution; using the strategy of dry mixing aggregate with ZrB2 to make ZrB2 preferentially adhere to the surrounding of aggregate particles; then using a two-step wet mixing and material packing process of adding the VC pretreatment solution first and then adding the remaining resin, the functions of vitamin C and zirconium diboride are coordinated in resisting thermal shock, which fundamentally inhibits the structural spalling of the magnesium carbon brick in the ladle.

This invention discloses an environmentally friendly composite artificial reef material and its preparation method, belonging to the field of marine ecological restoration technology. The material comprises a composite cementitious material, composite aggregate, modified biochar, shell powder, alkali activator, water, microbial slow-release microspheres, and basalt fiber. The preparation method includes microsphere and modified biochar preparation, dry mixing, wet mixing, molding and curing, and functionalization treatment. This invention addresses the problems of high alkalinity and slow bio-attachment in traditional artificial reefs by employing a solid waste-based composite cementitious system to reduce alkalinity. Microbial microspheres are embedded at specific points on the surface through geometric locking of micro-pits and anchoring with calcium alginate gel, achieving a long-term slow-release supply of microorganisms. This invention combines environmental friendliness, low alkalinity, and active microbial supply.

The application discloses fly ash and cement based aggregate-free high-strength concrete and a preparation method thereof, and belongs to the technical field of building materials. The concrete is made of the following raw materials in parts by mass: 50-70 parts of 42.5 grade and above Portland cement, 15-25 parts of fly ash, 15-25 parts of silica ash, 0.5-3.0 parts of high-performance composite foaming agent, and the total water-binder ratio is 0.25-0.40. The preparation method comprises the following steps: uniformly dry mixing the cementitious material and admixture, then adding water and stirring to form a slurry; uniformly mixing stable foam prepared by physically foaming the foaming agent into the slurry; and pouring and performing combined curing of standard curing and steam curing. The application controls the dry density of the concrete at 800-1600 kg / m3, and the 28-day compressive strength is stabilized at more than 10 MPa under the condition of no traditional sand aggregate, by optimizing the ratio of the ternary cementitious system of cement-fly ash-silica ash, using high-performance foam stabilizer and strictly controlling the low water-binder ratio, so that the problems of low strength and poor durability of the existing aggregate-free concrete are solved.

This invention relates to the field of building materials technology and discloses a method for preparing modified micron-sized bamboo fiber reinforced concrete. The method involves preparing ordinary silicate cement, coarse and fine aggregates, water, a water-reducing agent, an alkali-resistant stabilizer, a water-retaining thickener, and 10-500 μm modified micron-sized bamboo fibers according to a specified ratio. During preparation, the aggregates and cement are dry-mixed, the first batch of fibers is added and dry-mixed again, then water and various additives are added and wet-mixed, and finally the remaining fibers are mixed in and thoroughly. The modified micron-sized bamboo fibers are prepared by heating and impurity treatment with sodium hydroxide solution, washing until neutral, and then drying. This invention removes impurities and maintains strength through alkaline heat treatment, reduces water absorption to prevent interfacial debonding; the step-by-step feeding and alternating wet and dry mixing process overcomes the problem of agglomeration and clumping of flexible fine fibers; and the synergistic effect of the alkali-resistant stabilizer and water-retaining thickener resists strong alkali erosion of cement and prevents fiber segregation, thus helping to improve the early-stage resistance to plastic shrinkage cracking of concrete and enhance its later-stage toughness.

This invention relates to a polyurethane textured powder coating, its preparation method, and its application, belonging to the field of coating technology. The polyurethane textured powder coating of this invention comprises the following components in parts by weight: 50-80 parts of hydroxyl polyester resin, 3-10 parts of aliphatic blocked isocyanate curing agent, 0.1-1.0 parts of texture agent, and 0.2-1.5 parts of breathable agent. The preparation method is as follows: first, the raw materials except for the texture agent and breathable agent are melt-extruded to form a base powder; then, the texture agent and breathable agent are added via a post-addition dry mixing method. This method effectively avoids premature reaction of the texture additives during the extrusion process, ensuring the clarity and controllability of the texture effect. Through the synergistic effect of the components and the post-addition process, this invention enables the resulting coating to form a uniform and stable three-dimensional texture, while possessing excellent adhesion, mechanical properties, and outdoor weather resistance. It is particularly suitable for coating outdoor metal components with high requirements for decoration and durability, and has broad application prospects.

The application discloses a silicate modified fly ash based low-temperature grouting material and a preparation method thereof, and belongs to the technical field of grouting materials. The grouting material is obtained by mixing dry-mixed powder and water, and the dry-mixed powder comprises silicate modified fly ash, a basic cementing component, a low-temperature nucleation component, a water phase regulating component and a rheological adjusting component, wherein the silicate modified fly ash is a core-shell structure particle with a silicate coating layer on the surface. The application further discloses a preparation method of fly ash pretreatment, surface composite modification, temperature control drying film forming, step-by-step dry mixing and on-site water adding slurry forming. The material is suitable for grouting construction under low-temperature conditions.

The application relates to the technical field of building materials, in particular to a cement wear-resistant material for concrete floors and a preparation method thereof, the material is prepared from, in percentage by mass, 40-55% of cementing materials, 35-50% of wear-resistant aggregates, 5-15% of reinforced powders, 0.1-2% of admixtures, a water-binder ratio of 0.25-0.28, and the aggregates are subjected to three-stage cleaning, drying and screening during preparation, wet mixing is carried out after grading and dry mixing, the material is spread at a rate of 3-5 kg / m2 during the initial setting stage, the material is collected for 3-4 times, and a fluorine-containing silane sealant is coated after curing for 7-14 days, the abrasion loss of the material is reduced by 45-60% according to the material technical scheme, the tensile strength is greater than or equal to 2.8 MPa, and the material is suitable for heavy-load scenes.

The application discloses a non-sintering corundum reinforced geopolymer flat membrane and a preparation method thereof, and comprises 100 parts of aluminosilicate, 80-130 parts of alkaline activator solution, 50-150 parts of corundum powder, 0.3-2.0 parts of plasticizer, 0.5-5.0 parts of organic fiber and 0-40 parts of soluble pore-forming agent. The above components are prepared into the non-sintering corundum reinforced geopolymer flat membrane through the steps of raw material pretreatment and dry mixing, slurry preparation, vacuum degassing, extrusion molding, programmed curing and drying and post-processing. The application realizes the non-sintering preparation of the flat membrane, reduces the production energy consumption and emission, effectively overcomes the defects of large brittleness and easy cracking of the pure geopolymer material in drying, and reduces the warping and cracking of the flat membrane in the drying process through process adjustment, and improves the yield.

The application discloses a modified full-solid-waste cementing material and a preparation method thereof, and belongs to the technical field of building materials. The material takes various industrial solid wastes as main raw materials, is subjected to directional modification treatment and is compounded with functional components, and is prepared through dry mixing, water stirring, pouring and standard curing. Through optimization of component compounding and interface combination, the application activates the cementing activities of the solid wastes, significantly improves the material density and mechanical properties, and effectively improves the defects of traditional full-solid-waste cementing materials, such as easy deterioration at high temperature, fast strength attenuation and the like. The obtained product has stable mechanical properties at normal temperature, is complete in structure, has high strength retention rate at high temperature, has no problems such as cracking, loose and peeling, and can meet the use requirements of high-temperature engineering structures. The application realizes high-value utilization of industrial solid waste resources, is green, low-carbon, low-cost and process-controllable, and widens the application range of the full-solid-waste cementing material.

This utility model discloses a premixing device for automotive interior surface treatment agents, belonging to the technical field of premixing devices. It includes a mixing cylinder with a stirring mechanism rotatably connected inside. A material discharge mechanism is located within the mixing cylinder's inner cavity, positioned above the stirring mechanism. Through the material discharge mechanism and a separating tray, the mixing cylinder's working chamber is divided into two premixing chambers, enabling independent premixing of solid and liquid raw materials. This effectively prevents direct contact between solid and liquid raw materials before reaching the set process conditions, preventing premature contact that could trigger a chemical reaction and thus avoiding decomposition or deactivation of the active ingredients. This ensures stable premixing effect and treatment agent performance. The premixing design allows solid raw materials to be initially dispersed through a dry mixing process, preventing localized agglomeration and clumping when directly added to the liquid, effectively reducing the possibility of material clumping leading to lower solid-liquid mixing efficiency.

This invention discloses an incense stick based on natural plant materials, prepared from the following raw materials in parts by weight: 10-30 parts Hainan agarwood, 5-20 parts Nha Trang agarwood, 15-40 parts Poria cocos, 10-30 parts Albizia julibrissin bark, 20-50 parts Ziziphus jujuba seed, 15-35 parts Polygonum multiflorum, 5-25 parts Ganoderma lucidum, 3-15 parts frankincense, and 2-15 parts Phoebe zhennan powder. The incense stick is prepared through the steps of processing and extraction, compatibility and dry mixing, wet mixing to make incense paste, shaping and drying, and cellar aging. The dry mixing and wet mixing are prepared using a special mixing device, which completely solves the problem of uneven mixing in traditional methods, thereby ensuring the combustion performance and aroma release of the incense. Through inhalation and the regulation of the aromatic environment, it achieves multi-target and multi-level synergistic effects, resulting in a significant calming and sleep-aiding effect.

The application relates to the technical field of building materials, and discloses a cement-free solid-waste-based cementitious material and a preparation method and application thereof. The cementitious material is prepared from slag powder, fly ash, steel slag powder, desulfurization gypsum, cement and a solid alkaline synergist according to specific proportions by weight; the preparation method adopts a two-step dry mixing process, bulk solid waste raw materials are first put into a mixer for sufficient premixing and homogenization, then a synergist composed of anhydrous sodium carbonate and sodium hydroxide is added for secondary dispersion mixing, and a dynamic feeding checking mechanism based on the feedback of intermediate semi-finished product liquid-phase pH value detection results is established. Through the synergistic effect of strong alkali excitation of the solid synergist and coagulation adjustment of the sulfate, rapid depolymerization of aluminosilicate glass and dense gel construction are realized, which is beneficial to solving the storage and transportation problem of the liquid excitation agent, reduces carbon emission, and improves the volume stability and mechanical strength of the material.